body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
}

.hero-section {
    background: #6c63ff;
    color: #fff;
    text-align: center;
    padding: 50px 20px;
}

.hero-section h1 span {
    color: #f4f4f4;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

.koleksi-section, .promo-section, .testimoni-section {
    padding: 40px 20px;
    text-align: center;
}

.book-list {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.book-item {
    background: #f9f9f9;
    border: 1px solid #ddd;
    padding: 20px;
    text-align: center;
    width: 200px;
    border-radius: 8px;
}

.book-item img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    margin-top: 10px;
    color: #fff;
    background: #6c63ff;
    text-decoration: none;
    border-radius: 4px;
    font-weight: bold;
}

.btn-secondary {
    background: #333;
}

.footer-section {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 20px 0;
}